Jacob gass



UNITED STATES PATENT OFFICE.

JACOB cass, or rREvoR'roN, PENNSYLVANIA, AssrGNon 'ro HIMsELF `AND GEO.

MOWTON.

MACHINE FOR SLATING COAL.

Specification of Letters Patent No. 18,687, dated November 24, 1857.

To all whom 'itmay concern:

Be it known that I, JACOB Grass, of Trevorton, in the county ofNorthumberland and State of Pennsylvania, have invented a new and usefulImprovement in Machinery for Slating or Separating Coal; and I do herebydeclare that the following is a full, clear, and exact description ofthe same, reference being had to the accompanying drawings, forming partof this specification, in which- Figure 1, is a vertical, longitudinalsection of a coal slater constructed after my invention. Fig. 2, is atransverse section through the line m, x, in Fig. l. Fig. 3, is atransverse section in the line y, y, of Fig. l.

Similar letters of reference in each of the several figures indicatecorresponding parts.

The nature of my invention consists in the employment in the process ofslating coal of an inclined revolving cylinder when said cylinder isconstructed with the following several peculiar features for united use,to wit, checkered circumferentially near the center of its length withsmall square openings, furnished with narrow oblong slots from itsreceiving end to the checkering, and with similar, but wider, slots fromthe discharge end to the checkering, andeach or every other one of itsslats furnished with a beveled V shaped rib, internally, which onlyextends from the checkering to the ends of the cylinder.

The first part of my invention, to wit, the intermediate checkeredsection, insures the discharge of a portion of the Asmaller coalentirely free from slate, before arriving at the lower extremity of thecylinder, and thus is eifected a saving of a portion of the labor whichhas necessarily to be spent in picking the coal even after it has passedthrough my slater. And the second part of my invention, to wit, theinner lips or ribs render more certain the discharge of the slatebetween the slatted portions of the cylinder before the escape of thecoal, it compelling the slate to assume a vertical position under theaxis of the cylinder and then slide out between the slats.

To enable others skilled in the art to make and use my invention, I willproceed to de scribe .its construction and operation.

A, represents the frame in which the slating cylinder is hung.

B, is the slating cylinder, its axis is parallel with its sides, but ishung incliningly in the frame, so as to give the cylinder an inclinationfrom a horizontal plane, as shown in Fig. l, and thus effect theautomatic passage of the coal from the reception to the discharge end ofthe cylinder. The cylinder B, is slatted from a, to b, and is checkeredfrom o, to c, and then again slatted from o, to UZ, Fig. l.

C, C, are beveled ribs or lips on the inner side of the slats, extendingfrom a., to b, and from c, to d. The slats of the sect-ion a, b, areplaced closer together than those of the sect-ion Z), c, or c, d, sothat no coal shall escape with the slate until it arrives at thecheckered section. The section b, c, is checkered with square openingswhich are made broader than the spaces between the slats a, Z?, so thatthe smaller coal which may have been slated in its passage through thesection a, Z), may escape before passing into the section c, d, and thusa considerable amount of the labor which is necessarily spent in pickingthe coal, even after being passed through the slater, is saved. Thespaces between the slats of the section c, d, are made no broader inwidth than the checks or square openings of section b, c, so that thelarger coal which cannot escape through section o, c, shall not be ableto pass through them, but shall be compelled to pass to the end of thecylinder in order to make an exit and consequently be subjected to theslating process in their passage through section c, d.

As the coal passes through the slatted sections, the slate is kept fromsliding round with the coal, by the ribs or lips, and consequently whenit arrives under the axis of the cylinder, it stands in a verticalposition and by its gravity falls through the spaces between the slatsas illustrated in red in l Fig. 3.

The operation is as follows: The coal being introduced at the elevatedend of the cylinder, and the cylinder set in rapid motion, it ascendsand passes through section a, o, to section 6,0. At. this point suchportion of the coal as may have been deprived of its slate and is smallenough to pass through the checks or square openings o, c, escapeswithout carrying any foreign substances with it. While the small coal isescaping through this sect-ion a new supply is being slated in sectiona, b, and ready to pass into ZJ, 0,' at the same time that portion barsplaced fartherapart at one end than.

at the other,rso as to provide oblong slots of different widths, hasbeen used for clean- Y ing grain, also that a cylinder' of thisconstruction has been furnishedl with an intermediate perforatedsection, therefore I do not claim this, but i "What I do claim as myinvention and desire to secure by Letters Patent, is-

constructed withthe several peculiar features for united use, to wit,checkered circumferentially near the center of its length with smallsquare openings, furnished with narrow oblong slots from its receivingend to the checkering and with similar, but wider slots from thedischarge end to the checkering and each, or every other one of itsslats furnished with a beveled or VA-shaped rib, internally, which onlyextends from the checkering to the ends of the cyl- ,inder,substantially as and for the purposes set forth.

The above specification of my improvement'in slating coal signed andwitnessed Ithis twentieth day of August 1857.

JACOB GASS.

G. YORKE AT LEE, MUNN & Co.

Witnesses: The employment in the process of slating l t coal, of therevolving inclined Cylinder, when

